25 grams of thallium, colorless, odorless and highly toxic, changed the fate of two young people and brought great misfortune to their two families. A 23-year-old girl from Suzhou was actually able to successfully purchase thallium, which is not allowed to be bought and sold casually by the state, through online shopping and took it to commit suicide; a man who had just graduated from university and worked for only four months sold 25 grams of thallium for 1500 yuan due to a momentary lapse in judgment, now faces a prison sentence.